Surface-enhanced laser-induced breakdown spectrum enhancement method
A technology of laser-induced breakdown and surface enhancement, which is applied in the field of plasma emission spectroscopy detection, to achieve the effects of improving analysis efficiency, increasing electron number density, and improving detection limit
Inactive Publication Date: 2019-03-22
ANHUI NORMAL UNIV
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[0026] image 3 It is a comparison chart of spectral intensity before and after argon assist obtained by the method of the present invention. As shown in the figure, the characteristic spectral intensity of Cd element obtained by the argon-assisted SENLIBS technique is enhanced compared with that without argon-assisted.
[0027] In summary, a surface-enhanced laser-induced breakdown spectrum enhancement method proposed by the present invention can indeed increase the spectral intensity of the analyte element with the aid of argon gas, and improve the detection limit of the analyte element in the SENLIBS technology.
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The invention discloses a surface-enhanced laser-induced breakdown spectrum enhancement method. The method increases electron number density, enhances the emission spectrum strength of plasma and improves the detection limit of surface-enhanced laser-induced breakdown spectrum technology (SENLIBS) by virtue of the advantages that argon atoms have a semi-stable state with a relatively low excitation energy state and are easily ionized to generate electrons. Compared with existing SENLIBS technology pretreatment methods, the method disclosed by the invention avoids the cumbersomeness of the existing pretreatment methods (such as liquid-liquid extraction and chemical replacement) and improves the analysis efficiency of the SENLIBS technology.
Description
technical field [0001] The invention belongs to the technical field of plasma emission spectrum detection, and in particular relates to a surface-enhanced laser-induced breakdown spectrum enhancement method. Background technique [0002] Surface-enhanced laser-induced breakdown spectroscopy (SENLIBS for short) is a new method for liquid detection by LIBS technology. This technology realizes the transformation of the liquid to be tested from the liquid phase to the solid phase by putting the liquid to be tested on the surface of the non-water-absorbing substrate and drying it, and increases the plasma temperature and electron number density through the substrate to enhance the intensity of the plasma emission spectrum . [0003] The SENLIBS technology was first proposed by M. A. Aguirre et al. (Spectrochimica Acta Part B: AtomicSpectroscopy, 2013. 79-80(3): 88-93). 10 μL of the extracted manganese chloride liquid was dried on the surface of the aluminum substrate, and Detec...
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IPC IPC(8): G01N21/71
CPCG01N21/718
Inventor 杨新艳崔执凤姚关心郑贤锋黄静春李宽国袁扬胜刘小明左则文卢宁
Owner ANHUI NORMAL UNIV
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